﻿// Copyright (c) 2025 BobLd
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.

using System;
using System.Threading;
using System.Threading.Tasks;
using Caly.Core.Services.Interfaces;
using CommunityToolkit.Mvvm.Input;
using Microsoft.Extensions.DependencyInjection;

namespace Caly.Core.ViewModels
{
    public partial class PdfDocumentViewModel
    {
        [RelayCommand(CanExecute = nameof(CanCopyText))]
        private async Task CopyText(CancellationToken token)
        {
            try
            {
                if (!TextSelectionHandler.Selection.IsValid)
                {
                    return;
                }

                IClipboardService clipboardService = App.Current?.Services?.GetRequiredService<IClipboardService>() ??
                                                     throw new NullReferenceException($"Missing {nameof(IClipboardService)} instance.");

                await clipboardService.SetAsync(this, token);
            }
            catch (Exception e)
            {
                System.Diagnostics.Debug.Write(e.ToString());
                Exception = new ExceptionViewModel(e);
            }
        }
        
        private bool CanCopyText()
        {
            return TextSelectionHandler.Selection.IsValid;
        }
    }
}
